Remember not too long ago when Yahoo announced that it had twice as many documents indexed as Google? Well, there has been a recent study done by Matthew Cheney, Mike Perry, and Dr. Orville Vernon Burton of the National Center for Supercomputing Applications in which they have concluded that this claim is somewhat suspicious.
“It is the opinion of this study that Yahoo!’s claim to have a web index of over twice as many documents as Google’s index is suspicious. Unless a large number of the documents Yahoo! has indexed are not yet available to its search engine, we find it puzzling that Yahoo!’s search engine consistently returned fewer results than Google.”